| Index | South Lancaster | Massachusetts | National |
| Average Test Scores | n/a | 52% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,167 | 79,221 |
| Total private schools | 2 | 508 | 24,874 |
| Total post-secondary schools | 1 | 193 | 7,963 |
| Index | South Lancaster | Massachusetts | National |
| Completed 8th grade | 95.8% | 88.3% | 84.3% |
| Completed high school | 94.3% | 87.2% | 83.0% |
| Completed some college | 74.6% | 65.0% | 59.4% |
| Completed associate degree | 59.0% | 49.0% | 38.5% |
| Completed bachelors | 44.7% | 41.2% | 30.3% |
| Completed masters | 6.6% | 18.2% | 11.5% |
| Completed professional degree | 1.1% | 5.4% | 3.3% |
| Completed doctorate | 0.0% | 2.6% | 1.3% |
There are a total of n/a public schools, 2 private schools and 1 post-secondary schools in South Lancaster. Using the proficiency score averages, the average test scores for South Lancaster, MA schools is n/a. The average student to teacher ratio is n/a. In South Lancaster, MA, an average of 95.8% of students have completed 8th grade and an average of 94.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hopkinton, MA | 3,864 | 82% | 69.8% |
| Groton, MA | 1,127 | 75% | 55.6% |
| Westborough, MA | 4,024 | 74% | 54.0% |
| Northborough, MA | 6,532 | 69% | 44.4% |
| Littleton Common, MA | 3,370 | 66% | 36.5% |
| South Lancaster, MA | 1,575 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Oakland, NE | 1,575 | 60% | 24.0% |
| Jackson Center, OH | 1,575 | 77% | 60.4% |
| New Market, TN | 1,576 | 40% | 17.7% |
| Cornersville, TN | 1,574 | 37% | 23.4% |
| Osgood, IN | 1,576 | 47% | 2.6% |
| South Lancaster, MA | 1,575 | n/a |
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